feat(compat): re-export StreamableHTTPServerTransport + EventStore types from /node

[felixweinberger]

Part of the v2 backwards-compatibility series — see reviewer guide.

v2 renamed StreamableHTTPServerTransport → NodeStreamableHTTPServerTransport. v2 already kept the Options type alias (incoherent). This adds the class alias + EventStore/EventId/StreamId re-exports.

Motivation and Context

v2 renamed StreamableHTTPServerTransport → NodeStreamableHTTPServerTransport. v2 already kept the Options type alias (incoherent). This adds the class alias + EventStore/EventId/StreamId re-exports.

v1 vs v2 pattern & evidence

v1 pattern:

`import { StreamableHTTPServerTransport } from '@modelcontextprotocol/sdk/server/streamableHttp.js'`

v2-native:

`import { NodeStreamableHTTPServerTransport } from '@modelcontextprotocol/node'`

Evidence: GitHub code search: ~1,700 files.

How Has This Been Tested?

• Import-compiles test
• Integration: validated bump-only against 5 OSS repos via the v2-bc-integration validation branch
• pnpm typecheck:all && pnpm lint:all && pnpm test:all green

Breaking Changes

None — additive @deprecated shim. Removed in v3.

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist

• I have read the MCP Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added or updated documentation as needed

Additional context

Stacks on: none

[changeset-bot]

🦋 Changeset detected

Latest commit: 3d48f5e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@modelcontextprotocol/node	Patch

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